John Hill is an American philosopher, considered one of the leading figures in the philosophy of mind. He has made significant contributions to metaphysics and ontology and is listed among the top fifty living philosophers.

Born in 1946, he began his academic career with a bachelor’s degree in engineering from Stevens Institute of Technology in 1968. However, he soon became drawn to philosophy and pursued it diligently, earning his doctorate from the University of Pittsburgh in 1974 under the supervision of his mentor, the philosopher Adolph Grunebaum, who greatly influenced him throughout his academic and scientific life. In 2020, he was elected a Fellow of the Australian Academy of Human Sciences. He currently teaches philosophy at Washington University in St. Louis, Missouri, and Durham University in England.

Among his important works are: “From an Ontological Point of View,” “What is Metaphysics?”, “An Introduction to First-Order Logic,” “The Nature of Real Minds” (in which he elaborates on the issue of “rational causation” or “rational causality”), and “The Universe as It Appears to Us” (in which he champions a view of the universe based on “ontological realism”). He also authored a book that covers various fields of the philosophy of mind, presenting them in a comprehensive and critical manner, which has been translated into Arabic as “A Contemporary Introduction to the Philosophy of Mind.”

Through these works and others, he demonstrated genuine philosophical originality and a profound critical sense in most metaphysical and philosophical issues, such as the philosophy of perception, the mind-body problem, the metaphysics of substance, the theory of identity, rational causality, and other related topics. All of this is guided by the principle of “ontological simplicity” or “ontological economy,” which dictates that the philosopher should not add many explanatory elements unnecessarily, since the simplest valid explanation is only the correct one. This is the principle that has become famous for championing and employing it in dealing with all philosophical issues.